(a)Authority to practice in trademark cases. Only an individual qualified to practice under § 11.14 of this chapter may represent an applicant, registrant, or party to a proceeding before the Office in a trademark case. (b) (1)Recognition of practitioner as representative. To be recognized as a representative in a trademark case, a practitioner qualified under § 11.14 of this chapter may: (i) File a power of attorney that meets the requirements of paragraph (c) of this section; (ii) Sign a document